Fastening device for emergency-exit doors



April 17, 1928. 1,666,677

r w. B. BOLLES FASTENING DEVICE FOR EMERGENCY EXIT DOORS Filed May 5.1926 I31; .1 J j K5 gm wanton 7W WW Patented Apr. 17, 1 923.

UNITED STA WILLIAM isnnrnsmnotms, or MILWAUKEE, wrsoonsm.

1 msrnnino nnvron son EMERGENCY-Earn nouns.

Application filed my 5,

7 escape doors where it is not neeesss ry to provic'le' for accessthrough the doors from the outside of the building.

The invention has for ts object to provide a simple, effective andinexpensive fastening device wliich can beinstontly'and easily releasedfrom the inside of the building which effectively prevents opening ofthe doors from the outside of thebuilding.

With thenbove and other objectsin view the inventionvrnay be said to.comprise the door fastening device as illustrated in the accompanyingdrawings hereinafter described and particularly set forth in the eppended claims, together with such variations and modifications thereofas will be ap-v parentto one skilled in the art to which the inventionappertains. p j

Reference should be had to the accompanying drawings forming or partotthis specification in which Fig. 1 is a, horizontal section throughthe door andits tra'metoken immediately above the fastening device; Fig.2 is a section on line 2-2 of Fig.1; Fig. 3 is a side elevation of thekeeper attached to the door jamb;Figs.- 4 and!) are sectional viewssimilar to Fig. 2'showing modified forms of the invention; v I

Referring to the accompanying drawings adoor, is indicated by thenumeral .1 and s attached to the jtunb 2 of thedoor frame by suitablehinges 3, the free edge of the door engaging with the opposite "doorjamb' 4 when the-door isin closed position; A pair of brackets 5 21cattached to the inner side of the door adjacent the opposite side edgesthereof "atsubstantially the-hei ht'froni the floor of thensuel doorknob. Each of the brackets 5 has side flanges 6 extending outwardly atright angles'to the plane of the door and upper and lower guard flanges7 and Sconneotingthei upper and lower edges of the'flanges 6; Rigid.arms 9 and 10 are mounted between the side flanges 6 of'the tubularcross bar-14; fits in the elbow socket 19216:. Sci-hi1 3 105355.

12 of the arm 9 and extends through the T socket 13v of the arm 10, theouter end of the lmr1 4.-projecting beyond the end of the socket 13. J Akeeper 15 is. rigidly secured .to the jain'b 4 inwardly of the door stopand this kee er isin the form of a plate 'liesflat against the jomb 4;and which issecurcd to the jamb by means of suitable screws 17. Theupper ed e of the keeper plate which projects inwardly from the face Tss;PATENT(OFFICE;-

of the door jamb is formed to provide 'an I nreu'nte retaining portion18 and forwardly of the retaining portion 18 is formed to pro vide aninclined cam portion 19 on the side of the keepert'owardthedoor.

The reta ning portion 18 of the keeper is] 1 formed substantially on anarc of a circle wl'ii'eh has'its center atthe axis of the pivot- 11whenthe door is in closed position, the radius of the are upon which theflange 18 is formed being substantially equal to the distance betweenthe axis of the pivot pin 11 and the tubular cross bar 14 so that whenthe door is in closed position the arm 10"ean be swungjebout its pivotwith the pro ect in; portion of the cross bar 141 in contact or close tothe areuato edge portion 18 oi the keeper. ;The lower guard flanges 8 ofthe brackets 5 limit the movement of the arms 9 and lOand serve tonormally supportthese arms in substantially horizontal positions at Iright angles to the plane of the door. hen the door is in closedposition the weight of the crossbar 14 and 'arms 9 and 10 tends to movethe arms down into engagement with the guard 8 and the arms aresupported in herzontal positions with the projection of the bar 14behind theflange 18 of the keeper. When the cross bar is held in thisposition the door effectively held against opening from. the outside butcan be instantly and easily released by a person on the insidcQit beingsimply necessary to 1i it the cross bar 14 until the projecting endthereof is lifted clearof the flange 18 to release the door. The upperguard flange 7 is :rshort flange between the upper edges ofthe sideflange 6 which serves to limitthe inward swinging ,movement of the arms10 so that the knuckles of a person operating the her are "preventedfrom coming in contact with the door. In

its

opening-the door it isnecessary simply to lift on the bar 14 and swingthe armsfl and 10 to substantially vertical position and then pushoutward on the her, the movement of the arms from horizontal to verticalposition fie - tot-he brackets releasing the extension of the cross barfrom the kee 101 so that the door is time to open. iVhen tie door isswung to closed position, the tubular cross bar 14!: will engage withthe inclined cam extension 1i)v of the keeper and will ride uptllisincline'and over the top of the arcuate portion 18 and when thedoor is fully closed, the bar 14 willhave been moved by gravity tolocking position and will hold the door tightly against its stops.

In order to provide a more positive stop for the arms 9 and 10 and toprevent injury '5 by impact of the arms against. the guard flanges 7 and8, the arms 9 and 10 are each provided with an extensionfll), the innerends of which engage with the upper guard flanges 7 when the arms are inhorizontal position and with the lower guard flanges 8 when the arms arein substantially vertical position.

- 1 s shown in Fig 4 of the drawing, the action of gravity in holdingthe bar 14 in its outern'iost position with the supporting arms 9 and 10horizontal, may be assisted .by springs 21 interposed between the armsand supporting brackets.

shown in Fig. 5 the device may be used in inverted position. springs 21must he of sullicient strength to normally hold the supporting arms inhorizontal position. lVhen the keeper and lock bar are-mounted on thejainh and door in inverted position, the lock bar is released byj'mshing the same downwardly and the bar is forced upwardly to lockingsprings 21 when the door is closed. I claim- 1. ln a device of thecharacter described, the combination with a hinged door and its frame,of a keeper member. opposite that to which the door is hinged andprojecting into the door opening, rigidarms pivoted to the inner sideofthe door adjacent opposite edges thcreoi to swing vertically between theframe members and a cross bar connecting the outer ends of said arms.the arm adjacent the free edge of the door-having a projection outwardlyof its pivot'which is adapted to engage with said keeper.

in which I case the position by the attached to the frame 2.v In adevice of the character described, the combination with a hinged doorand its frame, of a keeper attached to the frame member opposite that towhich the door is hinged, rigid arms pivoted to the inner side of thedoor adjacent opposite edges thereof jacent the free edge of the doorhaving a.

lateral projection, means carried by said brackets for normally holdingsaid arms in horizontal positions, a cross bar connecting saidarms,

member with which the free edge of the door engages. said keeper heme;so positioned as to he between said projection and the door when thedoor is closed and the arms are in horizontal position.

4. In a device of the character described the COITllJlHZliT-lfill with ahinged door and its frame. of a pair of brackets secured to the innerface of thedoor. one adjacent the hinged edge and one adjacent the freeedge thereof. a rigid arm connected to each of the brackets by ahorizontal pivot. the armadiacent the free edge of the door having avlateral projection. means carried by said brackets tor normally holdin;said arms in horizontal positions. a cross bar connecting said arms. anda. keeper secured to the frame member with which the free edge ofthedoor engages, said keeper being: so positioned as to be between saidprojection and the door when the door is closed and the arms are inhorizontal position. and said keeper having a cam Face on the sidetoward the door'over which the projection is adapted to ride durine thefinal closing movement of the door.

In testimony whereof, I hereunto afiix my signature.

WILLIAM BERTRAM BOLLES.

and a keeper secured to the frame

